diff --git a/docs/usage/types.md b/docs/usage/types.md
index b4b5efe..8c2d920 100644
--- a/docs/usage/types.md
+++ b/docs/usage/types.md
@@ -221,7 +221,7 @@ _(This script is complete, it should run "as is")_
     pydantic can't validate the values automatically for you because it would require
     consuming the infinite generator.
 
-## Validating the first value
+#### Validating the first value
 
 You can create a [validator](validators.md) to validate the first value in an infinite generator and still not consume it entirely.